/*
 * Licensed to the Apache Software Foundation (ASF) under one
 * or more contributor license agreements.  See the NOTICE file
 * distributed with this work for additional information
 * regarding copyright ownership.  The ASF licenses this file
 * to you under the Apache License, Version 2.0 (the
 * "License"); you may not use this file except in compliance
 * with the License.  You may obtain a copy of the License at
 *
 * http://www.apache.org/licenses/LICENSE-2.0
 *
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS,
 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 * See the License for the specific language governing permissions and
 * limitations under the License.
 */
package com.hortonworks.registries.storage.search;

import com.fasterxml.jackson.annotation.JsonIgnoreProperties;

import java.io.Serializable;

/**
 *
 */
@JsonIgnoreProperties(ignoreUnknown = true)
public class OrderBy implements Serializable {
    private static final long serialVersionUID = 8220102056152801315L;

    private String fieldName;
    private boolean asc;

    private OrderBy() {
    }

    private OrderBy(String fieldName, boolean asc) {
        this.fieldName = fieldName;
        this.asc = asc;
    }

    public String getFieldName() {
        return fieldName;
    }

    public boolean isAsc() {
        return asc;
    }

    @Override
    public boolean equals(Object o) {
        if (this == o) return true;
        if (o == null || getClass() != o.getClass()) return false;

        OrderBy orderBy = (OrderBy) o;

        if (asc != orderBy.asc) return false;
        return fieldName != null ? fieldName.equals(orderBy.fieldName) : orderBy.fieldName == null;
    }

    @Override
    public int hashCode() {
        int result = fieldName != null ? fieldName.hashCode() : 0;
        result = 31 * result + (asc ? 1 : 0);
        return result;
    }

    public static OrderBy asc(String fieldName) {
        return new OrderBy(fieldName, true);
    }

    public static OrderBy desc(String fieldName) {
        return new OrderBy(fieldName, false);
    }
}
